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Force Limiting Connections to Mitigate Accelerations in Moment Resisting Frames with Pinned-Base Spines
Mid-rise moment resisting frames (MRF) which utilize supplemental pinned-base spines (spine) to prevent the formation of story mechanisms experience higher mode accelerations at near elastic spectral values. Force Limiting Connections (FLC) can be introduced to reduce the floor accelerations from the higher mode responses while having small impact on first-mode response and maintaining the story mechanism prevention from the spine. Results from nonlinear response history analysis (NRHA) of a 4-story MRF-Spine system show how floor accelerations for higher modes are reduced with the addition of FLC placed between the MRF and spine. Peak effective pseudo accelerations are utilized to show how pseudo spectral accelerations are reduced by the introduction of FLC. Full-scale testing of the 4-story MRF-Spine structure supports the numerical results of the MRF-Spine and MRF-Spine-FLC numerical analyses. These results show the potential benefits of adding FLC to MRF-Spine systems.
Force Limiting Connections to Mitigate Accelerations in Moment Resisting Frames with Pinned-Base Spines
Mid-rise moment resisting frames (MRF) which utilize supplemental pinned-base spines (spine) to prevent the formation of story mechanisms experience higher mode accelerations at near elastic spectral values. Force Limiting Connections (FLC) can be introduced to reduce the floor accelerations from the higher mode responses while having small impact on first-mode response and maintaining the story mechanism prevention from the spine. Results from nonlinear response history analysis (NRHA) of a 4-story MRF-Spine system show how floor accelerations for higher modes are reduced with the addition of FLC placed between the MRF and spine. Peak effective pseudo accelerations are utilized to show how pseudo spectral accelerations are reduced by the introduction of FLC. Full-scale testing of the 4-story MRF-Spine structure supports the numerical results of the MRF-Spine and MRF-Spine-FLC numerical analyses. These results show the potential benefits of adding FLC to MRF-Spine systems.
Force Limiting Connections to Mitigate Accelerations in Moment Resisting Frames with Pinned-Base Spines
Lecture Notes in Civil Engineering
Mazzolani, Federico M. (editor) / Piluso, Vincenzo (editor) / Nastri, Elide (editor) / Formisano, Antonio (editor) / Duncan, Jessica (author) / Astudillo, Bryam (author) / Sause, Richard (author) / Ricles, James (author) / Fahnestock, Larry (author) / Simpson, Barbara (author)
International Conference on the Behaviour of Steel Structures in Seismic Areas ; 2024 ; Salerno, Italy
2024-07-03
11 pages
Article/Chapter (Book)
Electronic Resource
English
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